@incollection{MSMF_1979__60__7_0,
     author = {Penot, Jean-Paul},
     title = {Introduction to the volume},
     booktitle = {Analyse non convexe (Pau, 1977)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {7--24},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {60},
     year = {1979},
     doi = {10.24033/msmf.257},
     zbl = {0412.90058},
     url = {http://archive.numdam.org/articles/10.24033/msmf.257/}
}